The existence of non-baryonic dark matter is strong evidence for new physics beyond the current Standard
Model. While laboratory and collider searches for dark matter have advanced rapidly over the past several
decades, astrophysical observations currently provide the only robust, positive, empirical measurement of dark
matter. Astrophysical observables can be directly linked to the fundamental properties of dark matter, such as
particle mass, self-interaction cross section, and self-annihilation rate. In this talk, I will describe how the Dark
Energy Survey and the Fermi Gamma-Ray Space Telescope have advanced our understanding of dark matter
through observations of the smallest and most dark-matter- dominated galaxies. These recent observations help
to address the "missing satellites problem" and set strong constraints on thermal models of particle dark matter.
The Large Synoptic Survey Telescope (LSST) promises even greater advances in our understanding of dark matter
in the coming decade.